<template>
    <div>
         <!-- 用户列表组件  面包些导航 -->
 <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/welcome' }">后台首页</el-breadcrumb-item>
    <el-breadcrumb-item >数据统计</el-breadcrumb-item>
    <el-breadcrumb-item>数据报表</el-breadcrumb-item>
  </el-breadcrumb>
  <el-card>
    <!-- 为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 900px;height:700px;"></div>
  </el-card>
    </div>
</template>

<script>
    // 导入echarts
    import * as echarts from 'echarts'
    import _ from 'lodash'
    export default {


        data() {
            return {
                //需要合并的数据
                options: {
                    title: {
                        text: '用户来源'
                    },
                    tooltip: {
                        trigger: 'axis',
                        axisPointer: {
                            type: 'cross',
                            label: {
                                backgroundColor: '#E9EEF3'
                            }
                        }
                    },
                    grid: {
                        left: '3%',
                        right: '4%',
                        bottom: '3%',
                        containLabel: true
                    },
                    xAxis: [{
                        boundaryGap: false
                    }],
                    yAxis: [{
                        type: 'value'
                    }]
                }
            }
        },

        async mounted() {
            // 基于准备好的dom，初始化echarts实例
            var myChart = echarts.init(document.getElementById('main'));
            const {
                data: res
            } = await this.$http.get('reports/type/1')
            if (res.meta.status !== 200) {
                return this.$message.error('获取折线图数据失败！')
            }

            // 指定图表的配置项和数据  深拷贝合并两者 赋值给一个变量
            const result = _.merge(res.data, this.options)


            // 使用刚指定的配置项和数据显示图表。
            myChart.setOption(result);
        },
    }
</script>


<style lang="less" scoped>

</style>